The GMAT tests a lot of skills—from quantitative analysis to passage reading to correcting grammar flaws.

Our GMAT CAT prep course draw problems on sections like Data Sufficiency, Reading Comp, Problem Solving, and Sentence Correction to give you precise data on how you're doing and what you need to work on. You can watch the detailed video answers as you go for every question and answer choice.

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GMAT Quantitative or GMAT Math Section

The GMAT tests quantitative reasoning ability with these two question types:

• Problem solving
• Data sufficiency

Problem Solving Sample Question

Problem-solving questions are ordinary multiple-choice math questions. They test your mastery of basic mathematical skills and your ability to solve problems using arithmetic, basic algebra, and geometry. Some problems will be plain mathematical calculations; the rest will be presented as real-life word problems that will require mathematical solutions.

For each of the following questions, select the best of the answer choices.
Numbers: All numbers used are real numbers.
Figures: The diagrams and figures that accompany these questions are for the purpose of providing information useful in answering the questions. Unless it is stated that a specific figure is not drawn to scale, the diagrams and figures are drawn as accurately as possible. All figures are in a plane unless otherwise indicated.

Q1. Betty left home with $60 in her wallet. She spent 1/3 of that amount at the supermarket, and she spent 1/2 of what remained at the drugstore. If Betty had no other expenditures, how much money did she have when she returned home?

1. $10
2. $15
3. $20
4. $40
5. $50

Explanation: A quick calculation will show that the correct answer is (C). Betty spent 1/3 of $60, or $20, at the supermarket, leaving her with $40. Of the $40, she spent 1/2, or $20, at the drugstore, leaving her with $20 when she returned home.

Data Sufficiency Sample Question

Data sufficiency is a unique type of math question created especially for the GMAT. Each item consists of the question itself followed by two numbered statements. You must decide whether the statements - either singly or in combination - provide enough information to answer the question.

Each question below is followed by two numbered facts. You are to determine whether the data given in the statements is sufficient for answering the question. Use the data given, plus your knowledge of math and everyday facts, to choose between the five possible answers. Choose:

1. if statement 1 alone is sufficient to answer the question, but statement 2 alone is not sufficient
2. if statement 2 alone is sufficient to answer the question, but statement 1 alone is not sufficient
3. if both statements together are needed to answer the question, but neither statement alone is sufficient
4. if either statement by itself is sufficient to answer the question
5. if not enough facts are given to answer the question

Q1. Which copy machine, X or Y, makes copies at the faster rate?

1. Machine X makes 90 copies per minute.
2. In 3 minutes, X makes 1.5 more copies than Y.

Explanation: The correct answer is option (B). Statement (1) is not sufficient because it provides no information about machine Y. Statement (2), however, is sufficient because it tells you that X is faster than Y.

GMAT Verbal Section

The GMAT tests your verbal reasoning ability with these three question types:

• Reading comprehension
• Sentence correction
• Critical reasoning

Reading Comprehension Sample Questions

Reading comprehension questions, as the name implies, test your ability to understand the substance and logical structure of a written selection. The GMAT uses reading passages of approximately 200 to 350 words. Each passage has three or more questions based on its content. The questions ask about the main point of the passage, about what the author specifically states, about what can be logically inferred from the passage, and about the author's attitude or tone.

The directions for reading comprehension questions and an example of a short reading passage are as below. (Real passages are longer and are followed by three or more questions.)

Each passage is followed by questions or incomplete statements about the passage. Each statement or question is followed by lettered words or expressions. Select the word or expression that most satisfactorily completes each statement or answers each question in accordance with the meaning of the passage.

The international software market represents a significant business opportunity for U.S. microcomputer software companies, but illegal copying of programs is limiting the growth of sales abroad. If not dealt with quickly, international piracy of software could become one of the most serious trade problems faced by the United States.

Software piracy is already the biggest barrier to U.S. software companies entering foreign markets. One reason is that software is extremely easy and inexpensive to duplicate compared to the cost of developing and marketing the software. The actual cost of duplicating a software program, which may have a retail value of $400 or more, can be as little as a dollar or two - the main component being the cost of the CD. The cost of counterfeiting software is substantially less than the cost of duplicating watches, books, or blue jeans. Given that the difference between the true value of the original and the cost of the counterfeit is so great for software, international piracy has become big business. Unfortunately, many foreign governments view software piracy as an industry in and of itself and look the other way.

U.S. firms stand to lose millions of dollars in new business, and diminished U.S. sales not only harm individual firms but also adversely affect the entire U.S. economy.

Q1. In this passage, the author's primary purpose is to

1. criticize foreign governments for stealing U.S. computer secrets
2. describe the economic hazards software piracy poses to the United States
3. demand that software pirates immediately cease their illegal operations
4. present a comprehensive proposal to counteract the effects of international software piracy
5. disparage the attempts of the U.S. government to control software piracy

The correct answer is option (B). This question, typical of the GMAT, asks about the main point of the selection. Option (A) is incorrect. Though the author implies criticism of foreign governments, their mistake, so far as we are told, is not stealing secrets but tacitly allowing the operation of a software black market. Option (C) is incorrect since this is not the main point of the selection. You can infer that the author would approve of such a demand, but issuing the demand is not the main point of the selection you just read. Option (D) can be eliminated for a similar reason. Though the author might elsewhere offer a specific proposal, there is no such proposal in the selection you just read. Option (E) also is wrong since no such attempts are ever discussed. Finally, notice how well option (B) does describe the main issue. The author's concern is to identify a problem and to discuss its causes.

Q2. The author's attitude toward international software piracy can best be described as

1. concern
2. rage
3. disinterest
4. pride
5. condescension

The correct answer is option (A). This question asks about the tone of the passage, and concern very neatly captures that tone. You can eliminate option (B) as an overstatement. Though the author condemns the piracy, the tone is not as violent as to qualify as rage. Option (C) must surely be incorrect since the author does express concern and, therefore, cannot be disinterested.

Sentence Correction Sample Questions

Sentence correction questions test your mastery of Standard Written English. Your task is to evaluate the grammar, logic, and effectiveness of a given sentence and to choose the best of several suggested revisions.

In questions of this type, either part or all of a sentence is underlined. The sentence is followed by five ways of writing the underlined part. Choice (A) repeats the original; the other answer choices vary. If you think that the original phrasing is the best, choose option (A). If you think one of the other answer choices is the best, select that choice.

Sentence correction questions test your ability to recognize correct and effective expression. Follow the requirements of Standard Written English: grammar, choice of words, and sentence construction. Choose the answer that result in the clearest, most exact sentence, but do not change the meaning of the original sentence.

Q1. The possibility of massive earthquakes are regarded by most area residents with a mixture of skepticism and caution.

1. are regarded by most area residents with
2. is regarded by most area residents with
3. is regarded by most area residents as
4. is mostly regarded by area residents with
5. by most area residents is regarded with

The correct answer is option (B). In the original, the verb "are" does not agree with the subject "possibility." Options (B), (C), and (D) make the needed correction. Option (C) is wrong, however, because "as" is not idiomatic and option (D) is wrong because the placement of "mostly" makes it modify "regarded" rather than "area residents," thereby changing the meaning of the sentence.

Q2. Despite the repeated warnings against drug abuse and the numerous fatalities, drug use is equally as prevalent, if not more so than, a decade ago.

1. equally as prevalent, if not more so than, a decade ago.
2. equally as prevalent, if not more so than, it was a decade ago.
3. as prevalent, if not more than a decade ago.
4. as prevalent as, if not more prevalent than, it was a decade ago.
5. as prevalent, if not more so than a decade ago.

The correct answer is option (D). The original is incorrect because the problem idiom is "as prevalent as," but the second "as" does not appear in the sentence. Only option (D) makes the needed correction.

Critical Reasoning Sample Question

Critical reasoning questions present brief statements or arguments and ask you to evaluate the form or content of the statement or argument.

Questions of this type ask you to analyze and evaluate the reasoning in short paragraphs or passages. For some questions, all of the answer choices may conceivably be answers to the question asked. You should select the best answer to the question, that is, an answer that does not require you to make assumptions that violate common sense standards by being implausible, redundant, irrelevant, or inconsistent.

Q1. In an extensive study of the reading habits of magazine subscribers, it was found that an average of between four and five people actually read each copy of the most popular weekly news magazine. On this basis, we estimate that the 12,000 copies of Poets and Poetry that are sold each month are actually read by 48,000 to 60,000 people.
The estimate above assumes that

1. individual magazine readers generally enjoy more than one type of magazine
2. most of the readers of Poets and Poetry subscribe to the magazine
3. the ratio of readers to copies is the same for Poets and Poetry as for the weekly news magazine
4. the number of readers of the weekly news magazine is similar to the number of readers of Poets and Poetry
5. most readers enjoy sharing copies of their favorite magazines with friends and family members

The correct answer is option (C). The argument draws an analogy between the popular weekly news magazine and Poets and Poetry. Based on the analogy, the speaker reaches a conclusion about the readership of Poets and Poetry. That argument assumes, however, that the ratio between copies and readers is similar for both magazines.

Q2. If military aid to Latin American countries is to be stopped because it creates instability in the region, then all foreign aid must be stopped.
Which of the following is most like the argument above in its logical structure?

1. If a war in Central America is to be condemned because all killing is immoral, then all war must be condemned.
2. If charitable donations are obligatory for those who are rich, then it is certain that the poor will be provided for.
3. If the fascist government in Chile is to be overthrown because it violates the rights of the people, then all government must be overthrown.
4. If a proposed weapons system is to be rejected because there are insufficient funds to pay for it, then the system must be purchased when the funds are available.
5. If a sociological theory is widely accepted but later proven wrong by facts, then a new theory should be proposed that takes account of the additional data.

The correct answer is option (C). The argument in the question stem commits the fallacy of hasty generalization in two respects. It reasons from military aid to Latin America (a particular type of aid to a certain region) to the general conclusion that all aid must be stopped, regardless of type or of recipient. Option (C) parallels this. From a particular conclusion about one form of government in one country, it moves to a general conclusion about all government - regardless of form or of society. Although options (A), (B), and (D) have superficial similarities of content (war, donation, military), the logical structures of these arguments differ from that of the stem paragraph. Option (A) is a valid argument: Given anything that is a war, if any war is to be condemned, then all wars are to be condemned. Option (B) is not a valid argument but a nonsequitur. It does not follow that an obligation on one party guarantees a benefit to any other. For example, there may not be enough rich to provide for all the poor. Option (D) is also a nonsequitur. That we reject a system now because we lack the money to buy it does not imply we should buy it when we have funds. Finally, option (E) is not really an argument but only a statement. Not all "If... , then..." statements mean "P, therefore Q." For example, "If you do not do the assignment, you will fail the course" is not an argument with a premise and a conclusion but a single statement that describes a causal relation.